TLE 6244X
1.13 Parallel Connection of Power Stages
The power stages (PS) which are connected in parallel have to be switched on and off simultaneously.
The corresponding SPI-Bits SCONx have to be in the same register (see page 15), when the PS are
serial controlled via SPI.
In case of overload the ground current and the power dissipation are increasing. The application has to
take into account that all maximum ratings are observed (e.g. operating temperature TJ and total
ground current IGND, see page 36, 37).
Max. number of parallel connections: 3
The following statements apply to PS within the same TLE6244X
The max. short circuit shutdown threshold of the parallel connected PS is the summation of the corre-
sponding max. values of the PS (ISC,OUTx + ISC,OUTy +....).
Max. Nominal Current
Max. Clamping Energy
On Resistance
2 symmetrical PS
(see note 1)
0.9 x (I
+ I
)
0.75 x (E
+ E )
Cl,OUTy
max,OUTx max,OUTy
Cl,OUTx
0.5 x R
on,OUTx,y
2 PS of the same type
(see note 2)
0.85 x (I
+ I
) 0.75 x (E
+ E
) 0.5 x R
0.34 x
max,OUTx max,OUTy
Cl,OUTx
Cl,OUTy
on,OUTx,y
0,8 x
(I
0,58 x
(E
3 PS of the same type
(see note 2)
+ I
+
+ E
+
max,OUTx max,OUTy
max,OUTz
Cl,OUTx
Cl,OUTz
Cl,OUTy
R
on,OUTx,y,z
I
)
E
)
2 PS with the same nominal
current, but different clamp-
ing voltage (application with-
out
Clamping energy
0.7 x (I
+ I
max,OUTx max,OUTy
)
)
R
R
x R
on,OUTy
on,OUTx
on,OUTx
of the PS with the lower
clamping voltage
+ R
on,OUTy
free-wheeling-diode)
(see note 3)
2 PS with the same nominal
current, but different clamp-
ing voltage (application with
free-wheeling-diode)
0.7 x (I + I
max,OUTx max,OUTy
no clamping required
R
R
x R
+ R
on,OUTy
on,OUTx
on,OUTy
on,Ax
(see note 3)
2 PS with the same clamp-
ing voltage, but different
nominal
I
max,OUTx
R
R
x R
+ R
E
on,OUTx
on,OUTx
on,OUTy
on,OUTy
Cl,OUTx
Max
I
max,OUTy
Min
E
current (see note 4)
Cl,OUTy
0.75 x (I
I
+
max,OUTx
max,OUTy
)
2 PS with different nominal
current and different clamp-
ing voltage (see note 5)
Clamping energy
of the PS with the lower
clamping voltage
I
I
max,OUTx
max,OUTy
R
R
x R
on,OUTx
on,OUTx
on,OUTy
+ R
Max
on,OUTy
Final Data Sheet
40
V4.2, 2003-08-29
INFINEON [ Infineon ]
